128356340 has 24 divisors (see below), whose sum is σ = 308055552. Its totient is φ = 44007840.

The previous prime is 128356339. The next prime is 128356357. The reversal of 128356340 is 43653821.

It is a junction number, because it is equal to n+sod(n) for n = 128356297 and 128356306.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 458276 + ... + 458555.

It is an arithmetic number, because the mean of its divisors is an integer number (12835648).

Almost surely, 2^128356340 is an apocalyptic number.

128356340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128356340 is an abundant number, since it is smaller than the sum of its proper divisors (179699212).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

128356340 is a wasteful number, since it uses less digits than its factorization.

128356340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 916847 (or 916845 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 128356340 is about 11329.4457057704. The cubic root of 128356340 is about 504.4356535923.

The spelling of 128356340 in words is "one hundred twenty-eight million, three hundred fifty-six thousand, three hundred forty".